package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.security.sasl.SaslClient;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
//     新增菜品和对应口味数据
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
//        向菜品表添加一条数据
        dishMapper.insert(dish);

//        获取insert语句生成的主键值
        Long dishId = dish.getId();
//        向口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach((dishFlavor) -> {
                dishFlavor.setDishId(dishId);
            });
//            插入数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

//      菜品分页查询
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

//       批量删除菜品
    @Transactional
    public void deleteBatch(List<Long> ids) {
        // 判断菜品是否能够被删除 -- 是否存在启售中的菜品
        for (Long id : ids){
            Dish dish = dishMapper.getById(id);
            if ( dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        // 是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishId(ids);
        if (setmealIds != null && setmealIds.size() > 0){
            // 已经关联套餐，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        // 删除菜品表中的菜品数据
//        for (Long id : ids){
//            dishMapper.deleteById(id);
//            // 删除菜品关联的口味数据
//            dishFlavorMapper.deleteByDishId(id);
//        }
        // 根据菜品id集合批量删除菜品数据
        dishMapper.deleteBatch(ids);

        // 根据菜品id集合批量删除关联的口味数据
        dishFlavorMapper.deleteByDishId(ids);
    }

    public DishVO getByIdWithFlavor(Long id) {
//        根据id查询菜品数据
        Dish Dish = dishMapper.getById(id);
//        根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

//        将查询到的数据封装到vo
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(Dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    //    根据id修改菜品消息和口味消息
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
//        修改菜品表基本信息
        dishMapper.update(dish);
//        删除原有口味信息
        dishFlavorMapper.deleteByDishId(Collections.singletonList(dishDTO.getId()));
//        重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach((dishFlavor) -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
//            插入数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

//    根据分类ID查询菜品
    public List<Dish> list(Long categoryId) {
        Dish dish =  Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());
            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }
        return dishVOList;
    }

//     修改菜品状态  启售停售
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.updateStatus(dish);
    }
}
